Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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Filing date
Publication date
Application filed by CSF Compagnie Generale de Telegraphie sans Fil SAfiledCriticalCSF Compagnie Generale de Telegraphie sans Fil SA
Application grantedgrantedCritical
Publication of FR929953ApublicationCriticalpatent/FR929953A/fr
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of DC signals of alternating polarity, coded pulses or impedance dialling
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Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR929953D1946-06-281946-06-28Perfectionnements aux dispositifs envoyeurs de signaux
ExpiredFR929953A
(fr)